Soldering-stick.



Y No'lrawing.,

I Tan STATES Parnu orme.;

Lnnwre nnfason'mms: GERMANY, nssreron 'ro Krrnns mn'rennwnnxn GESELL- snnA-rvr 'nur BESGHRNKTER Hemmer, or Bonn, GERMANY.

SOLDERING-STIGK To alli/whom t may concern.'

Be itknown Ythat I LUDWIG MAES, a subject of the King of Prussia, residing at 68 Bornheimers'trasse, olllon-,the-Hhine, Germany, have invented certain .new and useful Improvements in Soldering-Sticks;

` and 'I do :hereby declare vthe followingto be:V

a full, clear, and exact description of the invention, such will enable others skilled. in the art .to which it -appertains to .makel and use the same. The .present ,invention relai-,l :to .a solden'l ing stick of that kind in which inely divided Soft solder as well as soldering iuxes or media are finclosed in a casing. "Soldering sticks ordinarily consist of va", more or less hardened mass composed of,- wax, resin, sal-ammoniac, etc., with parti-1 cles of :tin-#solder embedded therein, which is Wrapped up ijn tnfil =or gpaper, or consist g of la tube of soft-:solder or a sheet `of tinfoil Which-is filled with a mixture offatl, 'Wax or the like and soldening fluxes or media, such as chlorid of zinc for exam le or which sticks .have been made .of a tu of solder lledwith gllanular solder mixed with resin/ Afrom the 'Soldering Sticks .0f t

Both have e defect that the ux is ynfesent;I in excess and is melted with a .slight amount oi heat. Consequently soldering sticks of the .former kind lose their cohesion in the heat required for soldering, and large pieces of the same, or, say, a part of. the particlesl ci itin' ,fall odin .an unmelted state, Withl relatively slight heating the l .flows .out`

l second kind and a' metal tube remains l'nihind, with; which it Off course not .possibles'to solder; as the .ux is'want-ing. These defects bowever are not onlyavoided by means of thel soldering;- Stick made in .accordance with the present invention, but a large number of other advantages are obtained.. For example strips or wires which are hidden in tela, phones maybe soldered nthe simplest manner without. any fear undesired connections,-short circuits, etc., are ermedbysolder which drops down. vFurther the present soldering stick isparticularly suitable for soldering armature Wires into the segments of commutators, for the zinc ormers of ,magnet coils and the like, `and at places where lare quantities off solder are necessary fort le union. 'This wlll be less perfectly attainable with a mass of soft solden appese une' paint, Abecause the liquid which 11s present 1n 1t must be heated a longer time 'which may be distributed in place for example 'by a brush, .has in .itself considerable advantages. t

lrod or stick is obtained by soft solder material consisting of finely divided (dustbeing intimately mixed with a vehicle for `example glycerin, resin-oil, saponiied resin, Let-c with or without sal-ammoniac or other Ide-oxidizing agent .or flux, and putting this A unixture into a casing of soft solder, as

unore particularly explained hereafter. The soldering metal or metallic alloy which is contained in the filling requires to be heated for a shorter time in order to :melt it, since it is in" a flnely divided and more or less .dustfl'ke state. The melting point of this soldering metal o1' alloy may be derent 'from that fof the casing.v The reason .of this is that, when soldering, the casing very quickly conducts away the heat which is supplied, Aand therefore continuously `requires fresh quantities of heat. The matter otherwise with the filling; the particles I.u efnts which act as 'insulators of heat. The `total quantity of heat which is supplied is :employed in .melting the heated part of the fi'lling, whereas the casing conducts away a great part of the heat which it receives. Good results are obtained, for example, :when the casing consists of an alloy of 50 lparts tin and 50 parts lead, and when the soft solder which is contained in the `filling consists of 67 parts tin and 33 parts lead, or vice-versa; naturally these relative quantities may be varied, and also these alloys of bther metals that may be used like lead and tin in softsolder. The soldering metal which is to Vbe employed for the filling is preferably lused'in the condition of fine dust, the same being, for example, intimately ground to a aste with concentrated chlorid of zinc solution 'and cellulose or other agammoniac may be employed. i.

The manufacture of the soldering stick 1s referably edected by the tube of metal or alloy being simply lled with the readyrai-,enten Nov; 1e, 191s.

may be composed alike `and may also consist.

glutine/nt, in which also an addition of salin onder to vaporize it, altlhough'such a mass The new technical effect of the present 4 like) soft solder of any desired composition of, metal are surrounded 'by the other constitmade paste-likesoft solder material by pressure, suction or the like. The tubes maybe filled when their manufacture takes place.

In practice a serviceable proportion .has been found when the strength of the casing is chosen in proportion to its contentsfso that there is one part by volume of theinclosed soft solder material to 2 to 4 arts by volume of the metallic casing. Ol) course these proportions may be still furthen varied.

If the new soldering stick is heated, for example with a soldering lamp," spirit ame or the like, a small part of the soft solder material which forms the filling and which also contains the flux is rst melted. This has a purifying effect on the place to be soldered and prevents `,the oxidization of the metal when soldering. The liquid solder from the filling which has melted together alloys with the metal of the casing which is now also melted. In the same degree as the casing melts, the filling enables vthe process of soldering to be carried out' in the manner just described. As soonas the soldering stick is no longer under the action of the heat, the soldering metalof the casand iilling which is still situated on the becomes stii", whereby the iilling is prevented from flowing out any more, because the molten metalv of the same eiects the melting of the casing in consequence of better conduction of heat. For this reason the opening closes easily as soon as the source of heat is removed or the heating action ceases. vIt is thus in ones power to apply only just as much solder as required.

The present soldering stick thus possesses the advantages of a mass of soft solder which can be applied like a painte. g. by' .brush Without possessing the disadvantages which are attached to a greater or smaller extent, to such and to knownj soldering sticks.

From the foregoing it will be seen that the llings comprlse comminuted soft solder and uxes or de-oxidizing agents, as sal-ammoniac,.zinc chlorid, or other materials having a de-oxidizing or reducing action. A

In combining the comminuted soft solder metal with the de-oxidizing agent or agentsit is sometimes necessary or advisable to use a liquid and the resulting mixture will be too thin for practical purposes; 'consequently, to' bring this mixture to a proper pasty consistency it is necessary to add a vehicle or4 mixtures thereof which may be or may contain an agglutinant. I use whatever ingredients are suitable'for the purpose, the aim being to obtain a filling of such pasty consistency that the comminuted metal will not settle out.v V

What I claim as my invention and desire tor secure by Letters Patent is:

1. A soldering stick consisting of a casing of soft solderwith a of apaste-like soit solder material which contains metallic soft solder in a inely divided state, said filling combining with the casing to close the casing and confine the filling upon removal of the soldering heat.

2. A soldering stick consisting of a casing f soft solder With a filling of a paste-like soft solder material which in itself is melted more' rapidly than the surrounding casing, vsaid filling consisting of dust-like soft solder, 4a de-oxidizing agent'and a vehicle, said lilling combining with4 the casing to close-the casing and'confine the lilling upon removal of the soldering heat.

3. `-A soldering stick consistingof a casing of soft solder with a filling of a paste-like soft solder material which in itself is melted casing to close the casing and confine the llling upon removal of the soldering heat.

5. A soldering stick having a case comi posed of soft solder and a fillingfof finely comminuted soft solder mixed to a paste with salammoniac and gylcerin, said filling combining with the casing to close the casing and coniine the filling upon removal of the soldering heat.

6. A soldering stick having a tubular4 case i composed of soft solder, and a paste filling containing finely comminuted soft solder and a thickening material, said filling combining with the casing to close said casing and confine the filling upon removal of the soldering heat. A

7. A soldering stick composed of a tubular case of soft solder and a filling ofcomminuted solder mixed to a paste with a deoxidizing agent and a vehicleksaid filling combining with the casing to automatically inclose the filling Within the tube upon removal of the soldering heat. f

8. A soldering stick comprising a tubular casing of solder and a filling of finely comminuted solder mixed to a paste with a highly deoxidi'zing agent and a vehicle, the

said filling combining with the metal of-the casing to automatically seal the end of the casingwhen the soldering heat is removed, thereby maintaining the-casing completely lled with thewpaste to its sealed end. v

9. A soldering stick comprising a tubular casing 5f solder and a filling of nely com-y minuted solder mixed to a 'paste' with salammoniac and glycerin, said filling melting together with'the metal of the casing atvthe end of the stick and .automatically sealing casing of solder and a filling of '9.0 parts of Iinely comminuted solder mixed to a paste with 10 parts of a solution consisting of a highly deoxidizing mixture, said filling meltingtogether with the metal of the casing at the end of the stick and automatically sealing the casing when the soldering heat is removed, thereby maintaining the casing completely filled with the paste to its sealed en v 11. soldering sticl comprising a tubular casing of Solder and a filling of 90 parts of finely comminuted solder mied to a paste with 10 parts of a solution consisting of salammoniac and glycerin, said filling melting together with the metal of the casing at the end of the stick and automatically Sealing the casing when-the soldering heat is removed, thereby maintaining the casing com/ 25 pletely filled with the paste to its sealedV end. In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

LUDWIG MAES.

Witnesses BEssIE' F. DUNLAP, Louis VANDonY. 

